Hi!
I use this board since jun/2019 with Armbian 5.90 and kernel 5.1.15 (all OK except HDMI audio). In these 6 months tried to update kernel image few times, 5.2.x some months ago and now 5.5.0, but not more 1920x1080 support, the maximum is 1280x1024. Xrandr not show as supported mode anymore, whats happen? This is related to u-boot? I think can not read EDID, because no monitor model name is shown.
Another question is, now in 5.5.x I can see HDMI audio device, but still can't listen, what left to be developed?